Abstract: Water depth and nitrogen nutrition are the key factors affecting the growth of wetland plants. Plant functional traits reflect plant adaptation strategies to environmental changes. Studies on the effects of water depth and nitrogen addition on the functional traits of wetland plants can help predict the growth and distribution of wetland plants under future environmental changes. Under the scenario with the impacts of global changes and human activities, the effects of changes in water depth and nitrogen enrichment on the functional traits of wetland plants can be more profound and complex. Here, we summarized the effects of water depth, nitrogen addition, and their interactions on growth-related traits, clonal reproductive traits, and biomass accumulation of wetland plants. In the future, we should pay more attention to strengthen the research in belowground and clonal reproductive traits of wetland plants, emphasize multi-scale and long-termseries research, and further explore the interactive effects of water depth and nitrogen addition on the functional traits of wetland plants.

Key words: water depth, nitrogen input, growth trait, reproductive trait, biomass allocation, global change.